<<登录旧系统审稿   登录新系统审稿>>

建议您登录自己的邮箱点击审稿链接进入审稿系统 ×
首页 学报新闻 学报概况 编委会 专家库 学术影响 投稿指南 审核流程 标准规范 下载专区 投诉邮箱 联系我们 EngLish

正文 您当前的位置:首页》正文

模拟酸雨对德保苏铁叶片光合作用及根系分泌有机酸的影响
作者: 周明昆1  2 *  李正文1 *  李志刚1  李素丽1  李 楠3 * *  刘 鹏1  2 * *  
单位: (1广西大学农学院  南宁 530005;2 浙江师范大学植物学实验室  浙江 金华 321004;  
关键词: 德保苏铁  模拟酸雨  叶片光合作用  根系分泌有机酸  影响  
分类号:Q948
出版年,卷(期):页码:2012 ,43 ( 5 ): 页码:587-591
摘要:

【Objective】Effects of acid rain on photosynthesis changes of leaves and organic acid secreted by roots of Cycas debaoensis were studied to better protect Cycas debaoensis. 【Method】According to the rainfall characteristics in Guangxi, simulated acid rain spraying was adopted to investigate changes in organic acid secreted by roots and photosynthetic physiology. 【Result】Under pH 2.1 acid rain stress, soil pH decreased, the plant leaves showed necrotic lesion, and net photosynthetic rate, stomatal conductance, transpiration rate and the plant intercellular CO2 concentration in leaves were all seriously impacted. Oxalic acid was the main organic acid detected from the roots of Cycas debaoensis. The oxalic acid secreted by the roots of Cycas debaoensis showed no change under moderate acid rain stress(pH 4.2 and pH 3.1), but obviously increased under strong acid rain stress(pH 2.1). 【Conclusion】Simulated acid rain with pH 2.1 severely damaged the leaves of Cycas debaoensis, and weakened their photosynthesis. In response, Cycas debaoensis roots had to secrete more organic acid to adapt and resist overwhelming acid rain stress.

基金项目:
作者简介:
参考文献:
服务与反馈:
文章下载】【加入收藏
总浏览数: 8 2 7 5 7 5 3  今日总人数: 4 1 1 2
主办:广西农业科学院    地址:广西南宁市大学东路174号   邮政编码:530007
电话:(+86)-771-3243905; (+86)-771-3244920   电子邮箱:nfnyxb@163.com
Copyright © 2011 Nfnyxb.com, All Rights Reserved  版权所有©2011《南方农业学报》编辑部   
 本系统由北京博思汇文数字科技有限公司设计开发 技术服务电话:13520358590

;